Rika, a Tokyo-born girl with large breasts, was visiting her paternal grandparents' home. One day, she saw her uncle sleeping on the veranda. His crotch was erect due to a natural physiological response. Rika, who knew nothing about sex, found this curious and, out of mischief, touched his crotch and made him ejaculate. Unbeknownst to her, her uncle had woken up and noticed everything. Since then, the recognition that 'Rika is a lewd girl' spread among the uncles, and Rika became a target for middle-aged men...
